When upgrading Orion...what/how did you monitor your network?
We use nagios to monitor services/processes on our servers. It also does ping checks so we will atleast get notified if something goes down. But that is all we get. Graphs have holes in them because of no data collection whenever I have to do maintenance.
I used Cirrus & the ping monitor for the short time it took.
Nothing, we just did it fast (under 35 minutes for a 2.5Gb Database).